Can not connect to database in Workgroup-Net on Windows-XP

Hi folks,

i have a workgroup (not a classic server) with Windows-XP-machines:

the database server machine contains the line
host all all 0.0.0.0 0.0.0.0 md5
in the file pg_hba.conf
and
listen_addresses = '*'
in the file postgresql.conf.

The clients' host file contain the line
nnn.nnn.nnn.nnn Labor where nnn.nnn.nnn.nnnn is the IP-adress of
the database server machine and /Labor /is the machine's name.

If i start PGAdmin III on the 'client' machine i can not connect to
the database on the machine Labor no matter wether i use the machine's name
or the IP-adress. Instead i get the message

"Zum Server ist keine Verbindung möglich,

oder Login/Passwort sind falsch.

Die Anmeldung wurde abgelehnt."

Please help me. What to do ?

mit freundlichen Grüßen / best regards,
Josef Springer
(Geschäftsleitung/Management)

[Postal]
Address
Josef(dot)Springer(at)joops(dot)com
Orlando-di-Lasso Str. 2
D-85640 Putzbrunn
[Phone]

Office
+49 (0)89 600 6920

[Phone]

Fax
+49 (0)89 600 69220

[Web]

Web
http://www.joops.com

[JOOPS]
-- the software company --